Was talking to a mechanic about tyres and the law/vehicle construction regulations.

My understanding is that all of the moving parts have to be within a vertical line drop from the widest part of the wheel arch.

The mechanics arguement was that the tread has to be inside the vertical line but that the wall could extend outside the vertical line.

Which interpretation is the correct one?

Regards


Leeds

IIRC, the tyre width Must be covered by the bodywork/arch flare as per 90/110's.

I think the whole tyre has to be inside the arch when the wheels are in the straight ahead position, although this rule doesn't seem to be strictly adhered to.


Les.

I think it's that no tread must be visable when viewed fron directly above.

I'm with Mark - it is the tread that must not be visible when viewed from above.

So far then we are split 50/50.


Think will err on side of caution and keep to my understanding of the law/regulations


Regards


Leeds

Tread coverage only, or it was last time i was reading the MOT testers handbook. If the sidewall of your tyre in not covered by a wheelarch this is not a problem.

Oz

I would agree that only the tread needs to be covered. In fact stock standard Landy 130 high cap pickup rear wheel arches barely cover the tread and the sidewalls are well exposed.

Yep, I have always been under the impresion that it is the tread that must be covered by the wheelarch. The sidewall and/or rim protruding is not an issue.
Mark